From be08f0c681a8469f2537f04de76e73a68c9c96e1 Mon Sep 17 00:00:00 2001 From: Vitaly Chikunov Date: Thu, 11 Apr 2019 18:51:22 +0300 Subject: [PATCH] integrity: support EC-RDSA signatures for asymmetric_verify Allow to use EC-RDSA signatures for IMA by determining signature type by the hash algorithm name. This works good for EC-RDSA since Streebog and EC-RDSA should always be used together. Cc: Mimi Zohar Cc: Dmitry Kasatkin Cc: linux-integrity@vger.kernel.org Signed-off-by: Vitaly Chikunov Reviewed-by: Mimi Zohar Signed-off-by: Herbert Xu --- security/integrity/digsig_asymmetric.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c index d775e03fbbcc..99080871eb9f 100644 --- a/security/integrity/digsig_asymmetric.c +++ b/security/integrity/digsig_asymmetric.c @@ -104,9 +104,16 @@ int asymmetric_verify(struct key *keyring, const char *sig, memset(&pks, 0, sizeof(pks)); - pks.pkey_algo = "rsa"; pks.hash_algo = hash_algo_name[hdr->hash_algo]; - pks.encoding = "pkcs1"; + if (hdr->hash_algo == HASH_ALGO_STREEBOG_256 || + hdr->hash_algo == HASH_ALGO_STREEBOG_512) { + /* EC-RDSA and Streebog should go together. */ + pks.pkey_algo = "ecrdsa"; + pks.encoding = "raw"; + } else { + pks.pkey_algo = "rsa"; + pks.encoding = "pkcs1"; + } pks.digest = (u8 *)data; pks.digest_size = datalen; pks.s = hdr->sig;